Abstract: A lighting fixture, in particular an exit sign luminaire or a similar instructive luminaire, which comprises a mounting housing (1) that is arranged to receive power supply (7) for a light source (5) of the luminaire and that is arranged for securing to a mounting base, such as a wall or a ceiling, and a sign part (2) that is arranged for securing in connection with the mounting housing (1). The mounting housing (1) is arranged to receive the light source (5) and the lighting fixture also comprises at least one optical fiber (6) arranged to transmit light, the first end (9) of which optical fiber is arranged in connection with the light source (5) in the mounting housing (1) and whose light-transmitting portion (8) is arranged in connection with the sign part (2) so as to illuminate it with light produced by the light source (5).

Abstract: A method and an arrangement in connection with a control gear arranged to control two parallel-connected fluorescent tubes, and a control gear, whereby the parallel-connected fluorescent tubes are fed using a single control gear in common, which comprises control means arranged to provide output current for the control gear in response to a current reference.

Abstract: An arrangement in connection with a discharge lamp, the arrangement comprising an electronic ballast for igniting and burning the discharge lamp, and a voltage control device arranged to modify supply voltage of the ballast. The voltage control device is further arranged to include a power control signal in the supply voltage. The arrangement further comprises a power filter and a control filter for separating the power control signal from the supply voltage, the ballast being responsive to the power control signal in order to control the level of light of a fluorescent tube.

Abstract: A method for determining the remaining operating life of a fluorescent lamp comprising cathodes, when the fluorescent lamp is a part of a fluorescent lamp circuit, which in addition to the fluorescent lamp includes a ballast, for example a capacitor and an inductance. In accordance with the method the remaining operating life of the fluorescent lamp is deduced from a phase difference of a voltage applied over a cathode in relation to another current or voltage phase in the fluorescent lamp circuit.

Abstract: A lighting arrangement for public transport vehicles comprising a light source and a reflective surface for reflecting light emitted from the light source to a passenger cabin in a public transport vehicle, whereby the upper part of the passenger cabin in the public transport vehicle substantially comprises an upper structure arranged above the seats of the passenger cabin, the structure comprises one or more handrails in the passenger cabin, and the light source is arranged inside the handrail of the upper structure in the public transport vehicle, and the handrail comprises one or more light-permeable apertures, and the handrail apertures are arranged to direct the light generated from the light source to the upper structure of the passenger cabin in the public transport vehicle, the upper structure being arranged to function as the reflective surface for providing the passenger cabin with indirect lighting.

Abstract: An emergency lighting arrangement and an emergency lighting apparatus, the arrangement being configured to be coupled to a supply network and the arrangement comprising an electronic ballast for igniting and burning a fluorescent lamp, the emergency lighting apparatus comprising a battery (Batt), recharge device (3) for recharging the battery from the supply network, a supply device (4) for supplying the battery voltage further, and a control unit (B), which is configured to control the devices of the emergency lighting apparatus. The electronic ballast of the emergency lighting system is a controllably dimmable ballast, and the emergency lighting apparatus further comprises means (C) for controlling the dimming of the electronic ballast.

Abstract: The arrangement in connection with a lighting fixture, and a lighting fixture, the arrangement comprising a first light source which is arranged in connection with the lighting fixture structure. The arrangement further comprises one or more second light sources and an optic guide, which comprises a first end, a second end and a guide portion between them; is arranged to transmit light over the guide portion between the first end and the second end; and is arranged in connection with a lighting fixture to provide dimmer lighting compared with the lighting provided with the first source, whereby one or more second light sources is/are arranged in connection with one end or both ends of the optic guide and to function as the light source of the optic guide.

Abstract: A corner arrangement for frame sections for securing together two frame sections (1, 2) located at an angle with respect to each other by means of a comer piece (3) comprising two legs (3a, 3b) located at a desired angle with respect to each other, the legs being arranged to be received by axial grooves (5) in the frame sections (1, 2) and both being equipped with at least one locking screw (4) in order to lock the corner piece (3) with respect to the frame sections. A point (6) of the locking screw (4) is of the shape of a cone or a truncated cone, and a counter surface (8) of the 10 locking screw in the frame section (1, 2) is correspondingly inclined with respect to the shape of the point of the locking screw such that the screw (4) subjects the profile (1, 2) to a force which forces the profile in the direction of the inner corner defined by the profiles therebetween.

Abstract: An arrangement in connection with a discharge lamp, the arrangement comprising an electronic ballast for igniting and burning the discharge lamp, and a voltage control device arranged to modify supply voltage of the ballast. The voltage control device is further arranged to include a power control signal in the supply voltage. The arrangement further comprises a power filter and a control filter for separating the power control signal from the supply voltage, the ballast being responsive to the power control signal in order to control the level of light of a fluorescent tube.

Abstract: A control gear for a fluorescent lamp, comprising a voltage source and an ignition and supply circuit comprising an inductive component and a capacitance. The control gear also comprises a transformer whose primary coil is connected parallel to the capacitance, and a switching element which is connected to the secondary coil of a transformer for short-circuiting it.

Abstract: A coil holder intended to be embedded through an opening in a circuit board or the like, the coil holder comprising a frame part arranged to receive one or more coil sections. The coil holder also comprises one or more connectors including a first and a second soldering pin end, whereby the first soldering pin end is arranged to be connected to a coil section to be wound onto the frame part of the coil holder and the second soldering pin end is arranged to be connected to the circuit board.

Abstract: A method for determining the remaining operating life of a fluorescent lamp, when the fluorescent lamp is connected to a starter and the fluorescent lamp comprises cathodes. The method is characterized by phases determining the amount of remaining active material in the cathode and producing an alarm signal depending on the amount of remaining active material in the cathode.

Abstract: A means for regulating the power of a fluorescent tube in a vehicle supplied by a DC source by providing the control circuit of an oscillator transistor of an inverter with an adjustable RC circuit. Even very much dimmed tubes can be lighted with the use of a switch by-passing the RC circuit.